They ran a bunch of stunts in that half. It takes a bit more work from the ends and doesn't allow as much freelancing, probably not something Jefferson is into.
Not talking blitz, talking about the DL. Running stunts will not let Calgary set up their extra blockers where they want them, the Bombers would dictate more where the rush is going to enter the pocket.
Bombers gotta just overloaded the inside gaps, run a ton of stunts. This straight up 3-4 man rush, hoping for a miracle from Jefferson or Jeffcoat is not working.
Bighill drops Begelton and chases a crosser running away from a QB stepping up in the pocket...literally a physically impossible throw, leaves Begelton wide open in middle of the field.
If that hit went to a review and the CFL didn't call it a penalty they have no defense when they get sued other than trying to say the players are submitting to head trauma by playing the sport.
You both aren't allowed to lead with your head (this has been a rule as long as football has been a sport) and you're also not allowed now to have an opponents head or neck be the main point of contact.